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40 lines
1.0 KiB
40 lines
1.0 KiB
import assignValue from './_assignValue.js'; |
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import baseAssignValue from './_baseAssignValue.js'; |
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/** |
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* Copies properties of `source` to `object`. |
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* |
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* @private |
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* @param {Object} source The object to copy properties from. |
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* @param {Array} props The property identifiers to copy. |
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* @param {Object} [object={}] The object to copy properties to. |
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* @param {Function} [customizer] The function to customize copied values. |
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* @returns {Object} Returns `object`. |
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*/ |
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function copyObject(source, props, object, customizer) { |
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var isNew = !object; |
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object || (object = {}); |
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var index = -1, |
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length = props.length; |
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while (++index < length) { |
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var key = props[index]; |
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var newValue = customizer |
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? customizer(object[key], source[key], key, object, source) |
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: undefined; |
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if (newValue === undefined) { |
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newValue = source[key]; |
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} |
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if (isNew) { |
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baseAssignValue(object, key, newValue); |
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} else { |
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assignValue(object, key, newValue); |
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} |
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} |
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return object; |
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} |
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export default copyObject;
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